Abstract: A portable multiuser sauna includes an enclosure configured as a truncated, regular icosahedron with ten sidewall triangular structural panels and five rooftop triangular structural panels, wherein each sidewall triangular structural panel is compressively coupled to at least two adjacent triangular structural panels.

Abstract: The present invention is directed to a method for dispensing a sterilizing gas. In the method, a liquid mixture of ethylene oxide and carbon dioxide is provided. A cylinder is partially filled with the liquid mixture of ethylene oxide and carbon dioxide. The head space of the cylinder is then pressurized with an inert gas at a pressure substantially higher than the vapor pressure of the liquid mixture of ethylene oxide and carbon dioxide. The liquid gas mixture is then dispensed from the cylinder under conditions whereby the head space pressure is maintained greater than the vapor pressure of the liquid mixture of ethylene oxide and carbon dioxide.

Abstract: The present invention is directed to a method for providing substantially particulate free gases by dispensing a highly pressurized gas from a carbon steel cylinder. The carbon steel cylinder is made by a process comprising the steps of forming an open ended cylinder from a billet, blank or tube of carbon steel. The side walls of the cylinder are made thicker than the desired final thickness of the cylinder side wall. One end of the cylinder is closed. The interior of the cylinder side walls is then honed to remove at least some of the excess side wall thickness. A tapered neck is then formed and tapped in the open end of the cylinder. The interior surface of the cylinder is then electropolished with a chromium rich electroplating solution to provide a surface layer with reduced iron and increased carbon and chromium on the interior surface wall of the cylinder. The cylinder may then be vacuum baked to reduce adsorbed contamination.